about delete email????

[oneflower]

Hi,anybody:

   How to delete mail immediately????
   
   When I selected a email ,click 'delete' button ,and it is maked 'D'.
   It is not  disappear at once.

   How to let it disapper at once????

BTW: My mail software:

  MySQL+ Redhat 6.2+ vpopmail4.8.4 + Sqwebmail0.37a



Best Regards

            oneflower
            [EMAIL PROTECTED]